Bug 1304176 - Remove PIP_TRUSTED_HOST and trust-host pip.conf option; r=ted

The Python code is now intelligent enough to add this flag on the
command line if supported. Eliminate the copy pasta and help prevent
cargo culting.

MozReview-Commit-ID: H4rbjbbgtRd

--HG--
extra : rebase_source : 2f3acf666d73260ed97ad877f365b3091186f9e2

testing/docker/android-gradle-build/dot-config/pip/pip.conf

@@ -1,4 +1,2 @@
 [global]
 disable-pip-version-check = true
-trusted-host = pypi.pub.build.mozilla.org
-

testing/docker/desktop-build/dot-config/pip/pip.conf

@@ -1,4 +1,2 @@
 [global]
 disable-pip-version-check = true
-trusted-host = pypi.pub.build.mozilla.org
-

testing/docker/desktop-test/dot-files/config/pip/pip.conf

@@ -1,4 +1,2 @@
 [global]
 disable-pip-version-check = true
-trusted-host = pypi.pub.build.mozilla.org
-

testing/docker/desktop1604-test/dot-files/config/pip/pip.conf

@@ -1,4 +1,2 @@
 [global]
 disable-pip-version-check = true
-trusted-host = pypi.pub.build.mozilla.org
-

testing/docker/tester/dot-config/pip/pip.conf

@@ -1,4 +1,2 @@
 [global]
 disable-pip-version-check = true
-trusted-host = pypi.pub.build.mozilla.org
-

testing/mozharness/configs/developer_config.py

@@ -25,9 +25,6 @@ config = {
     "exes": {
         "gittool.py": os.path.join(LOCAL_WORKDIR, "gittool.py"),
     },
-    "env": {
-        "PIP_TRUSTED_HOST": "pypi.pub.build.mozilla.org",
-    },
 
     # Pip
     "find_links": ["http://pypi.pub.build.mozilla.org/pub"],

testing/mozharness/configs/firefox_ui_tests/qa_jenkins.py

@@ -5,10 +5,6 @@ config = {
     # Tests run in mozmill-ci do not use RelEng infra
     'developer_mode': True,
 
-    'env': {
-        'PIP_TRUSTED_HOST': 'pypi.pub.build.mozilla.org',
-    },
-
     # PIP
     'find_links': ['http://pypi.pub.build.mozilla.org/pub'],
     'pip_index': False,

testing/mozharness/configs/firefox_ui_tests/releng_release.py

@@ -13,10 +13,6 @@ external_tools_path = os.path.join(
 
 
 config = {
-    'env': {
-        'PIP_TRUSTED_HOST': 'pypi.pub.build.mozilla.org',
-    },
-
     # General local variable overwrite
     'exes': {
         'gittool.py': [

testing/mozharness/configs/mediatests/jenkins_config.py

@@ -13,10 +13,6 @@ external_tools_path = os.path.join(
 )
 
 config = {
-    'env': {
-        'PIP_TRUSTED_HOST': 'pypi.pub.build.mozilla.org',
-    },
-
     # PIP
     'find_links': ['http://pypi.pub.build.mozilla.org/pub'],
     'pip_index': False,