Remove patching, unpin requirements for build

This is still experimental, in an attempt to remove patching from
the build.

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: Idcbfc079e15cf3901a30958989e11fc97981f740
diff --git a/makefiles/lint/robot/install.mk b/makefiles/lint/robot/install.mk
index b1f871c..d6cc842 100644
--- a/makefiles/lint/robot/install.mk
+++ b/makefiles/lint/robot/install.mk
@@ -28,7 +28,7 @@
 ## Intent: Install rflint python virtualenv package
 ## -----------------------------------------------------------------------
 $(lint-robot-cmd) : lint-robot-install
-lint-robot-install: venv-activate-patched
+lint-robot-install:
     # Verify package mentioned in requirements.txt
     # grep 'robotframework-lint' requirements.txt
 	$(activate) && pip freeze | grep 'robotframework-lint'
@@ -42,4 +42,3 @@
 	@echo
 
 # [EOF]
-