Remove developer tools from tripleo .gitignore

In line with [1] removing references to developer tools in
.gitignore.

[1] https://review.openstack.org/#/c/592520/
Change-Id: Ie25972a89efb8314d2632c804bca0f37c7f2630b

.gitignore

@@ -1,3 +1,15 @@
+# Add patterns in here to exclude files created by tools integrated with this
+# repository, such as test frameworks from the project's recommended workflow,
+# rendered documentation and package builds.
+#
+# Don't add patterns to exclude files created by preferred personal tools
+# (editors, IDEs, your operating system itself even). These should instead be
+# maintained outside the repository, for example in a ~/.gitignore file added
+# with:
+#
+# git config --global core.excludesfile '~/.gitignore'
+
+# Bytecompiled Python
 *.py[cod]
 
 # C extensions
@@ -31,13 +43,6 @@ nosetests.xml
 # Translations
 *.mo
 
-# Mr Developer
-.mr.developer.cfg
-.project
-.pydevproject
-
-*~
-*.swp
 *.bundle
 Gemfile.lock