Remove .bzlmod entry from .gitattributes

Removed .bzlmod entry from .gitattributes.

Author: snape

.gitattributes

@@ -43,7 +43,6 @@
 *                    text=auto
 
 *.bazel              text diff=python linguist-language=starlark whitespace-4
-*.bzlmod             text diff=python linguist-language=starlark whitespace-4
 *.cc                 text diff=cpp linguist-language=c++ whitespace-2
 *.cff                text linguist-documentation whitespace-2
 *.cfg                text whitespace-2