Mention only OpenGL ES (without version).

Doxyfile

@@ -198,7 +198,7 @@ ALIASES                = \
     "debugoperator{1}=@relates \1\n@brief Debug output operator" \
     "collisionoperator{2}=@relates \1\n@brief Collision of %\1 and %\2\n@see \2::operator%(const \1&) const" \
     "todoc=@xrefitem todoc \"Documentation todo\" \"Documentation-related todo list\"" \
-    "requires_gl=@xrefitem requires-gl \"Requires desktop OpenGL\" \"Functionality requiring desktop OpenGL (not available on OpenGL ES 2)\" Not available on OpenGL ES 2." \
+    "requires_gl=@xrefitem requires-gl \"Requires desktop OpenGL\" \"Functionality requiring desktop OpenGL (not available on OpenGL ES)\" Not available on OpenGL ES." \
     "requires_gl30=@xrefitem requires-gl30 \"Requires OpenGL 3.0\" \"Functionality requiring OpenGL 3.0\"" \
     "requires_gl31=@xrefitem requires-gl31 \"Requires OpenGL 3.1\" \"Functionality requiring OpenGL 3.1\"" \
     "requires_gl32=@xrefitem requires-gl32 \"Requires OpenGL 3.2\" \"Functionality requiring OpenGL 3.2\"" \

doc/mainpage.dox

@@ -26,7 +26,7 @@ Features:
 
 The engine is meant to be run on OpenGL 3 capable hardware, but most of the
 functionality is working on OpenGL 2.1 hardware too. The engine can be built
-also for OpenGL ES 2 with limited functionality. See also @ref required-extensions.
+also for OpenGL ES with limited functionality. See also @ref required-extensions.
 
 @section download-build Downloading and building Magnum
 

doc/required-extensions.dox

@@ -3,8 +3,8 @@
 
 The engine is meant to be run on OpenGL 3 capable hardware, but most of the
 functionality is working in OpenGL 2.1 hardware too (i.e. integrated Intel
-GPUs), unless stated otherwise. OpenGL ES 2 is also supported, see
-@ref building for guide how to build the engine for it.
+GPUs), unless stated otherwise. OpenGL ES is also supported, see @ref building
+for guide how to build the engine for it.
 
 Following are lists of functionality requiring specific OpenGL version. In
 most cases it is also specified which extension is required for given
@@ -22,7 +22,7 @@ supported on Intel GPUs even if they are capable of OpenGL 2.1 only).
 - @subpage requires-gl42
 - @subpage requires-extension
 
-@page requires-gl Functionality requiring desktop OpenGL (not available on OpenGL ES 2)
+@page requires-gl Functionality requiring desktop OpenGL (not available on OpenGL ES)
 @page requires-gl30 Functionality requiring OpenGL 3.0
 @page requires-gl31 Functionality requiring OpenGL 3.1
 @page requires-gl32 Functionality requiring OpenGL 3.2