ci: remove py2 ci (#280)

.travis.yml

 language: python
 python: 
-- '2.7'
 - '3.6'
 install:
 - pip install -r requirements.txt

README.md

@@ -13,7 +13,7 @@ Amundsen Databuilder is a data ingestion library, which is inspired by [Apache G
 For information about Amundsen and our other services, visit the [main repository](https://github.com/lyft/amundsen#amundsen) `README.md` . Please also see our instructions for a [quick start](https://github.com/lyft/amundsen/blob/master/docs/installation.md#bootstrap-a-default-version-of-amundsen-using-docker) setup  of Amundsen with dummy data, and an [overview of the architecture](https://github.com/lyft/amundsen/blob/master/docs/architecture.md#architecture).
 
 ## Requirements
-- Python = 2.7.x or Python >= 3.6.x
+- Python >= 3.6.x
 
 ## Doc
 - https://lyft.github.io/amundsen/

setup.py

@@ -53,7 +53,7 @@ setup(
     packages=find_packages(exclude=['tests*']),
     dependency_links=[],
     install_requires=requirements,
-    python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*',
+    python_requires='>=3.6,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*',
     extras_require={
         ':python_version=="2.7"': ['typing>=3.6'],  # allow typehinting PY2
         'all': all_deps,
@@ -68,7 +68,6 @@ setup(
         'druid': druid,
     },
     classifiers=[
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
     ],