Remove Ubuntu 16.04 from images

.github/workflows/releases-validation.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-latest, windows-latest, ubuntu-16.04, ubuntu-18.04, ubuntu-20.04]
+        os: [macos-latest, windows-latest, ubuntu-18.04, ubuntu-20.04]
         python: [3.5.4, 3.6.7, 3.7.5, 3.8.1]
     steps:
     - name: setup-python ${{ matrix.python }}

azure-pipelines/build-python-packages.yml

@@ -22,25 +22,6 @@ stages:
   jobs:
   - template: /azure-pipelines/templates/test-job.yml
 
-- stage: Build_Python_Ubuntu_1604
-  dependsOn: []
-  variables:
-    VmImage: 'ubuntu-16.04'
-    Platform: linux-16.04
-    Architecture: x64
-  jobs:
-  - template: /azure-pipelines/templates/build-job.yml
-
-- stage: Test_Python_Ubuntu_1604
-  condition: succeeded()
-  dependsOn: Build_Python_Ubuntu_1604
-  variables:
-    VmImage: 'ubuntu-16.04'
-    Platform: linux-16.04
-    Architecture: x64
-  jobs:
-  - template: /azure-pipelines/templates/test-job.yml
-
 - stage: Build_Python_Ubuntu_1804
   dependsOn: []
   variables:

builders/ubuntu-python-builder.psm1

@@ -86,10 +86,7 @@ class UbuntuPythonBuilder : NixPythonBuilder {
             Execute-Command -Command "sudo apt install -y $_"
         }
 
-        if ($this.Platform -ne "linux-16.04") {
-            ### On Ubuntu-1804, libgdbm-compat-dev has older modules that are no longer in libgdbm-dev
-            Execute-Command -Command "sudo apt install -y libgdbm-compat-dev"
-        }
-        
+        ### On Ubuntu-1804, libgdbm-compat-dev has older modules that are no longer in libgdbm-dev
+        Execute-Command -Command "sudo apt install -y libgdbm-compat-dev"
     }
 }

tests/ManifestConfig.Tests.ps1

@@ -5,7 +5,6 @@ $Configuration = Read-ConfigurationFile -Filepath $ConfigurationFile
 
 $stableTestCases = @(
     @{ ReleaseName = "python-3.8.3-darwin-x64.tar.gz"; ExpectedResult = @{ platform = "darwin"; platform_version = $null; arch = "x64"} },
-    @{ ReleaseName = "python-3.8.3-linux-16.04-x64.tar.gz"; ExpectedResult = @{ platform = "linux"; platform_version = "16.04"; arch = "x64"} },
     @{ ReleaseName = "python-3.8.3-linux-18.04-x64.tar.gz"; ExpectedResult = @{ platform = "linux"; platform_version = "18.04"; arch = "x64"} },
     @{ ReleaseName = "python-3.8.3-linux-20.04-x64.tar.gz"; ExpectedResult = @{ platform = "linux"; platform_version = "20.04"; arch = "x64"} },
     @{ ReleaseName = "python-3.8.3-win32-x64.zip"; ExpectedResult = @{ platform = "win32"; platform_version = $null; arch = "x64"} },
@@ -14,7 +13,6 @@ $stableTestCases = @(
 
 $unstableTestCases = @(
     @{ ReleaseName = "python-3.9.0-alpha.2-darwin-x64.tar.gz"; ExpectedResult = @{ platform = "darwin"; platform_version = $null; arch = "x64"} },
-    @{ ReleaseName = "python-3.9.0-beta.1-linux-16.04-x64.tar.gz"; ExpectedResult = @{ platform = "linux"; platform_version = "16.04"; arch = "x64"} },
     @{ ReleaseName = "python-3.9.0-rc.4-linux-18.04-x64.tar.gz"; ExpectedResult = @{ platform = "linux"; platform_version = "18.04"; arch = "x64"} },
     @{ ReleaseName = "python-3.9.0-beta.2-linux-20.04-x64.tar.gz"; ExpectedResult = @{ platform = "linux"; platform_version = "20.04"; arch = "x64"} },
     @{ ReleaseName = "python-3.9.0-beta.2-win32-x64.zip"; ExpectedResult = @{ platform = "win32"; platform_version = $null; arch = "x64"} },