Remove nonexistent ci directory (#192)

`ci` directory was removed in #188. Remove `ci` in `setup.py` 
and `.codeclimate.yml`.

Author: seisman

.codeclimate.yml

@@ -32,6 +32,5 @@ exclude_paths:
 - "versioneer.py"
 - "gmt/_version.py"
 - "doc/**/*"
-- "ci/*"
 - "gmt/tests/baseline/*"
 - "gmt/tests/data/*"

setup.py

@@ -24,7 +24,7 @@
 VERSION = versioneer.get_version()
 CMDCLASS = versioneer.get_cmdclass()
 
-PACKAGES = find_packages(exclude=["doc", "ci"])
+PACKAGES = find_packages(exclude=["doc"])
 SCRIPTS = []
 PACKAGE_DATA = {"gmt.tests": ["data/*", "baseline/*"]}