Remove 2017.3 from compat matrix

Author: cedricziel

.travis.yml

@@ -16,7 +16,6 @@ cache:
 
 matrix:
   include:
-  - env: IDEA_VERSION="IU-2017.3.5" PHP_PLUGIN_VERSION="173.4674.46" PSI_VIEWER_PLUGIN_VERSION="3.28.93" SINCE_BUILD="173" UNTIL_BUILD="173.*"
   - env: IDEA_VERSION="IU-2018.1.5" PHP_PLUGIN_VERSION="181.5281.35" PSI_VIEWER_PLUGIN_VERSION="2018.1.2" SINCE_BUILD="181" UNTIL_BUILD="181.*"
   - env: IDEA_VERSION="IU-182.3341.11" PHP_PLUGIN_VERSION="182.3341.34" PSI_VIEWER_PLUGIN_VERSION="182.2757.2" SINCE_BUILD="182" UNTIL_BUILD="182.*"
   allow_failures:

gradle.properties

@@ -16,7 +16,3 @@ psiViewerPluginVersion = 182.2757.2
 #ideaVersion = IU-2018.1.5
 #phpPluginVersion = 181.5281.35
 #psiViewerPluginVersion = 2018.1.2
-
-#ideaVersion = IU-2017.3.5
-#phpPluginVersion = 173.4674.46
-#psiViewerPluginVersion = 3.28.93