Remove support for Visual Studio 2015.

Changelog.md

@@ -20,6 +20,7 @@ Bugfixes:
 
 Build System:
  * Replace the trusty PPA build by a static build on cosmic that is used for the trusty package instead.
+ * Remove support for Visual Studio 2015.
 
 ### 0.5.1 (2018-12-03)
 

appveyor.yml

@@ -35,7 +35,6 @@ configuration:
     - RelWithDebInfo
 environment:
   matrix:
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
   # This is used for pushing to solidity-test-bytecodes
   priv_key:
@@ -63,12 +62,11 @@ install:
 before_build:
     - if not exist build mkdir build
     - cd build
-    - if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" ( cmake -G "Visual Studio 14 2015 Win64" .. -DTESTS=On )
-      else ( cmake -G "Visual Studio 15 2017 Win64" .. -DTESTS=On )
+    - cmake -G "Visual Studio 15 2017 Win64" .. -DTESTS=On
 build_script:
     - msbuild solidity.sln /p:Configuration=%CONFIGURATION% /m:%NUMBER_OF_PROCESSORS% /v:minimal
     - cd %APPVEYOR_BUILD_FOLDER%
-    - if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2017" ( scripts\release.bat %CONFIGURATION% 2017 )
+    - scripts\release.bat %CONFIGURATION% 2017
     - ps: $bytecodedir = git show -s --format="%cd-%H" --date=short
 
 test_script:

scripts/release.bat

@@ -29,13 +29,9 @@ REM ---------------------------------------------------------------------------
 set CONFIGURATION=%1
 set VERSION=%2
 
-IF "%VERSION%"=="2015" (
-    set "DLLS=C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\redist\x86\Microsoft.VC140.CRT\msvc*.dll"
-) ELSE (
 set "DLLS=MSVC_DLLS_NOT_FOUND"
 FOR /d %%d IN ("C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Redist\MSVC\*"
 	   "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Redist\MSVC\*") DO set "DLLS=%%d\x86\Microsoft.VC141.CRT\msvc*.dll"
-)
 
 7z a solidity-windows.zip ^
     .\build\solc\%CONFIGURATION%\solc.exe .\build\test\%CONFIGURATION%\soltest.exe ^