mesa/es: Remove redundant glFramebufferTexture3D textarget validation

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/mesa/main/APIspec.xml

@@ -2927,10 +2927,6 @@
 		<param name="level" type="GLint"/>
 		<param name="zoffset" type="GLint"/>
 	</proto>
-
-	<desc name="textarget" error="GL_INVALID_OPERATION">
-		<value name="GL_TEXTURE_3D_OES" category="OES_texture_3D"/>
-	</desc>
 </template>
 
 <template name="CheckFramebufferStatus" direction="get">