Removed unused uniform.

src/gl/shaders/skin.vert

@@ -8,7 +8,6 @@ void main(
 	uniform float4x4 u_proj,
 	uniform float4x4 u_world,
 	uniform float4x4 u_view,
-	uniform float4x4 u_texMatrix,
 	uniform float4 u_ambLight,
 	uniform float4 u_surfProps,
 	uniform float4 u_fogData,

src/gl/shaders/skin_gl3.inc

@@ -9,7 +9,6 @@ const char *skin_vert_src =
 "	uniform float4x4 u_proj,\n"
 "	uniform float4x4 u_world,\n"
 "	uniform float4x4 u_view,\n"
-"	uniform float4x4 u_texMatrix,\n"
 "	uniform float4 u_ambLight,\n"
 "	uniform float4 u_surfProps,\n"
 "	uniform float4 u_fogData,\n"