Fix multispot shader in deferred when using mesa drivers

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

@@ -23,12 +23,7 @@
  * $/LicenseInfo$
  */
 
-
-
-//class 1 -- no shadows
-
-#extension GL_ARB_texture_rectangle : enable
-#extension GL_ARB_shader_texture_lod : enable
+/*[EXTRA_CODE_HERE]*/
 
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
@@ -36,8 +31,6 @@ out vec4 frag_color;
 #define frag_color gl_FragColor
 #endif
 
-/*[EXTRA_CODE_HERE]*/
-
 uniform sampler2D diffuseRect;
 uniform sampler2D specularRect;
 uniform sampler2D depthMap;