Remove 'shader' param from shader param functions

libobs-d3d11/d3d11-shader.cpp

libobs-d3d11/d3d11-subsystem.cpp

libobs-opengl/gl-shader.c

libobs-opengl/gl-subsystem.c

libobs/graphics/effect.c

libobs/graphics/graphics-imports.c

libobs/graphics/graphics-internal.h

libobs/graphics/graphics.c

libobs/graphics/graphics.h