Removed duplicate enum values.
diff --git a/xml/gl.xml b/xml/gl.xml
index b9a1ab5..b413080 100644
--- a/xml/gl.xml
+++ b/xml/gl.xml
@@ -1419,8 +1419,6 @@
<enum name="GL_HISTOGRAM_EXT"/>
<enum name="GL_PROXY_HISTOGRAM"/>
<enum name="GL_PROXY_HISTOGRAM_EXT"/>
- <enum name="GL_HISTOGRAM"/>
- <enum name="GL_PROXY_HISTOGRAM"/>
</group>
<group name="IndexPointerType">
@@ -2999,7 +2997,6 @@
<enum name="GL_LEFT"/>
<enum name="GL_RIGHT"/>
<enum name="GL_FRONT_AND_BACK"/>
- <enum name="GL_NONE"/>
<enum name="GL_COLOR_ATTACHMENT0"/>
<enum name="GL_COLOR_ATTACHMENT1"/>
<enum name="GL_COLOR_ATTACHMENT2"/>