Remove no longer available cmd option
```
ERROR: Query expressions involving 'buildfiles' or 'loadfiles' cannot be used with --output=location
```
Closes
@@ -217,7 +217,7 @@ bazel query 'kind("generated file", //foo:*)'
#### What's the set of BUILD files needed to build `//foo`?
```sh
-bazel query 'buildfiles(deps(//foo))' --output location | cut -f1 -d:
+bazel query 'buildfiles(deps(//foo))' | cut -f1 -d:
```
<a name="What_are_the_individual_tests_th"></a>
