remove references to shaderMode.*

panda/src/pgraph/Sources.pp

@@ -91,7 +91,6 @@
     selectiveChildNode.I selectiveChildNode.h \
     sequenceNode.I sequenceNode.h \
     shadeModelAttrib.I shadeModelAttrib.h \
-    shaderMode.I shaderMode.h \
     shaderAttrib.I shaderAttrib.h \
     showBoundsEffect.I showBoundsEffect.h \
     spotlight.I spotlight.h \
@@ -193,7 +192,6 @@
     selectiveChildNode.cxx \
     sequenceNode.cxx \
     shadeModelAttrib.cxx \
-    shaderMode.cxx \
     shaderAttrib.cxx \
     showBoundsEffect.cxx \
     spotlight.cxx \
@@ -291,7 +289,6 @@
     selectiveChildNode.I selectiveChildNode.h \
     sequenceNode.I sequenceNode.h \
     shadeModelAttrib.I shadeModelAttrib.h \
-    shaderMode.I shaderMode.h \
     shaderAttrib.I shaderAttrib.h \
     showBoundsEffect.I showBoundsEffect.h \
     spotlight.I spotlight.h \