tests: remove hg10 requirement from test-check-pylint.t

Since pylint does its own directory traversal to find files to check and
doesn't use hg locate command, this requirement is not valid.

See also a29f071751df.

tests/test-check-pylint.t

@@ -1,4 +1,4 b''
-#require test-repo pylint hg10
+#require test-repo pylint
 
 Run pylint for known rules we care about.
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