diff --git a/doc/src/Commands_fix.rst b/doc/src/Commands_fix.rst
index 35e4f671ef..1b3dd8b246 100644
--- a/doc/src/Commands_fix.rst
+++ b/doc/src/Commands_fix.rst
@@ -97,8 +97,6 @@ OPT.
    * :doc:`latte <fix_latte>`
    * :doc:`lb/fluid <fix_lb_fluid>`
    * :doc:`lb/momentum <fix_lb_momentum>`
-   * :doc:`lb/pc <fix_lb_pc>`
-   * :doc:`lb/rigid/pc/sphere <fix_lb_rigid_pc_sphere>`
    * :doc:`lb/viscous <fix_lb_viscous>`
    * :doc:`lineforce <fix_lineforce>`
    * :doc:`manifoldforce <fix_manifoldforce>`
diff --git a/doc/src/fix.rst b/doc/src/fix.rst
index 92a00abe46..4a858ef7eb 100644
--- a/doc/src/fix.rst
+++ b/doc/src/fix.rst
@@ -240,8 +240,6 @@ accelerated styles exist.
 * :doc:`latte <fix_latte>` - wrapper on LATTE density-functional tight-binding code
 * :doc:`lb/fluid <fix_lb_fluid>` -
 * :doc:`lb/momentum <fix_lb_momentum>` -
-* :doc:`lb/pc <fix_lb_pc>` -
-* :doc:`lb/rigid/pc/sphere <fix_lb_rigid_pc_sphere>` -
 * :doc:`lb/viscous <fix_lb_viscous>` -
 * :doc:`lineforce <fix_lineforce>` - constrain atoms to move in a line
 * :doc:`manifoldforce <fix_manifoldforce>` - restrain atoms to a manifold during minimization
diff --git a/doc/src/fix_lb_fluid.rst b/doc/src/fix_lb_fluid.rst
index b67e69b5bc..0b473b2847 100644
--- a/doc/src/fix_lb_fluid.rst
+++ b/doc/src/fix_lb_fluid.rst
@@ -35,7 +35,7 @@ Syntax
        *dumpxdmf* values = N file timeI
            N = output the force and torque every N timesteps
            file = output file name
-	   timeI = 1 (use simulation time to index xdmf file), 0 (use output frame number to index xdmf file)
+           timeI = 1 (use simulation time to index xdmf file), 0 (use output frame number to index xdmf file)
        *dof* values = dof = specify the number of degrees of freedom for temperature calculation
        *scaleGamma* values = type gammaFactor
            type = atom type (1-N)
@@ -43,10 +43,10 @@ Syntax
        *a0* values = a_0_real = the square of the speed of sound in the fluid.
        *npits* values = npits h_p l_p l_pp l_e
            npits = number of pit regions
-	   h_p = z-height of pit regions (floor to bottom of slit)
-	   l_p = x-length of pit regions
-	   l_pp = x-length of slit regions between consecutive pits
-	   l_e = x-length of slit regions at ends
+           h_p = z-height of pit regions (floor to bottom of slit)
+           l_p = x-length of pit regions
+           l_pp = x-length of slit regions between consecutive pits
+           l_e = x-length of slit regions at ends
        *wp* values = w_p = y-width of slit regions (defaults to full width if not present or if sw active)
        *sw* values = none  (turns on y-sidewalls (in xz plane) if npits option active)
 
diff --git a/doc/src/fix_lb_pc.rst b/doc/src/fix_lb_pc.rst
deleted file mode 100644
index 4e44533bde..0000000000
--- a/doc/src/fix_lb_pc.rst
+++ /dev/null
@@ -1,26 +0,0 @@
-.. index:: fix lb/pc
-
-fix lb/pc command
-=================
-
-Syntax
-""""""
-
-.. parsed-literal::
-
-   fix ID group-ID lb/pc
-
-* ID, group-ID are documented in the :doc:`fix <fix>` command
-* lb/pc = style name of this fix command
-
-Examples
-""""""""
-
-.. code-block:: LAMMPS
-
-   fix 1 all lb/pc
-
-Description
-"""""""""""
-
-This fix was part of the old LATBOLTZ package and is now defunct.  LAMMPS standard integrator :doc:`fix NVE <fix_nve>` can be used in its place.
diff --git a/doc/src/fix_lb_rigid_pc_sphere.rst b/doc/src/fix_lb_rigid_pc_sphere.rst
deleted file mode 100644
index dddfe52265..0000000000
--- a/doc/src/fix_lb_rigid_pc_sphere.rst
+++ /dev/null
@@ -1,51 +0,0 @@
-.. index:: fix lb/rigid/pc/sphere
-
-fix lb/rigid/pc/sphere command
-==============================
-
-Syntax
-""""""
-
-.. parsed-literal::
-
-   fix ID group-ID lb/rigid/pc/sphere bodystyle args keyword values ...
-
-* ID, group-ID are documented in :doc:`fix <fix>` command
-* lb/rigid/pc/sphere = style name of this fix command
-* bodystyle = *single* or *molecule* or *group*
-
-  .. parsed-literal::
-
-       *single* args = none
-       *molecule* args = none
-       *group* args = N groupID1 groupID2 ...
-         N = # of groups
-
-* zero or more keyword/value pairs may be appended
-* keyword = *force* or *torque* or *innerNodes*
-
-  .. parsed-literal::
-
-       *force* values = M xflag yflag zflag
-         M = which rigid body from 1-Nbody (see asterisk form below)
-         xflag,yflag,zflag = off/on if component of center-of-mass force is active
-       *torque* values = M xflag yflag zflag
-         M = which rigid body from 1-Nbody (see asterisk form below)
-         xflag,yflag,zflag = off/on if component of center-of-mass torque is active
-       *innerNodes* values = innergroup-ID
-         innergroup-ID = ID of the atom group which does not experience a hydrodynamic force from the lattice-Boltzmann fluid
-
-Examples
-""""""""
-
-.. code-block:: LAMMPS
-
-   fix 1 spheres lb/rigid/pc/sphere
-   fix 1 all lb/rigid/pc/sphere force 1 0 0 innerNodes ForceAtoms
-
-Description
-"""""""""""
-
-This fix was part of the old LATBOLTZ package and is now defunct.  LAMMPS standard :doc:`fix rigid <fix_rigid>`  can be used in its place.
-
-