Dead uniform cleanup

indra/llrender/llrender.cpp

indra/llrender/llshadermgr.cpp

indra/llrender/llshadermgr.h

...ew/app_settings/shaders/class1/deferred/cloudShadowF.glsl

indra/newview/app_settings/shaders/class1/deferred/cofF.glsl

...app_settings/shaders/class1/deferred/multiSpotLightF.glsl

...view/app_settings/shaders/class1/deferred/spotLightF.glsl

...iew/app_settings/shaders/class1/deferred/underWaterF.glsl

.../newview/app_settings/shaders/class1/deferred/waterF.glsl

.../app_settings/shaders/class1/environment/underWaterF.glsl

...wview/app_settings/shaders/class1/environment/waterF.glsl

...w/app_settings/shaders/class1/windlight/cloudShadowF.glsl

...app_settings/shaders/class2/deferred/multiSpotLightF.glsl

...view/app_settings/shaders/class2/deferred/spotLightF.glsl

indra/newview/lldrawpoolwater.cpp

indra/newview/pipeline.cpp