remove unused Appveyour config

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22000)

(cherry picked from commit 8ac32e1e1b1a786366333acf897d332339610e6b)

appveyor.yml

@@ -1,78 +0,0 @@
-image:
-  - Visual Studio 2017
-
-platform:
-    - x64
-    - x86
-
-environment:
-    fast_finish: true
-    matrix:
-        - VSVER: 15
-
-configuration:
-    - shared
-    - plain
-    - minimal
-
-before_build:
-    - ps: >-
-        Install-Module VSSetup -Scope CurrentUser
-    - ps: >-
-        Get-VSSetupInstance -All
-    - ps: >-
-        gci env:* | sort-object name
-    - ps: >-
-        If ($env:Platform -Match "x86") {
-            $env:VCVARS_PLATFORM="x86"
-            $env:TARGET="VC-WIN32 no-asm --strict-warnings"
-        } Else {
-            $env:VCVARS_PLATFORM="amd64"
-            $env:TARGET="VC-WIN64A-masm"
-        }
-    - ps: >-
-        If ($env:Configuration -Match "shared") {
-            $env:SHARED="no-makedepend"
-        } ElseIf ($env:Configuration -Match "minimal") {
-            $env:SHARED="no-shared no-dso no-makedepend no-aria no-async no-autoload-config no-blake2 no-bf no-camellia no-cast no-chacha no-cmac no-cms no-comp no-ct no-des no-dgram no-dh no-dsa no-dtls no-ec2m no-engine no-filenames no-gost no-idea no-mdc2 no-md4 no-multiblock no-nextprotoneg no-ocsp no-ocb no-poly1305 no-psk no-rc2 no-rc4 no-rmd160 no-seed no-siphash no-sm2 no-sm3 no-sm4 no-srp no-srtp no-ssl3 no-ssl3-method no-ts no-ui-console no-whirlpool no-asm -DOPENSSL_SMALL_FOOTPRINT"
-        } Else {
-            $env:SHARED="no-shared no-makedepend"
-        }
-    - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" %VCVARS_PLATFORM%
-    - mkdir _build
-    - cd _build
-    - perl ..\Configure %TARGET% %SHARED%
-    - perl configdata.pm --dump
-    - cd ..
-    - ps: >-
-        if (-not $env:APPVEYOR_PULL_REQUEST_NUMBER`
-            -or (&git log -1 $env:APPVEYOR_PULL_REQUEST_HEAD_COMMIT |
-                 Select-String "\[extended tests\]") ) {
-            $env:EXTENDED_TESTS="yes"
-        }
-
-build_script:
-    - cd _build
-    - ps: >-
-        If ($env:Configuration -Match "shared" -or $env:EXTENDED_TESTS) {
-            cmd /c "nmake build_all_generated 2>&1"
-            cmd /c "nmake PERL=no-perl 2>&1"
-        }
-    - cd ..
-
-test_script:
-    - cd _build
-    - ps: >-
-        If ($env:Configuration -Match "shared" -or $env:EXTENDED_TESTS) {
-            if ($env:EXTENDED_TESTS) {
-                cmd /c "nmake test V=1 2>&1"
-            } Else {
-                cmd /c "nmake test V=1 TESTS=-test_fuzz 2>&1"
-            }
-        }
-    - ps: >-
-        if ($env:EXTENDED_TESTS) {
-            mkdir ..\_install
-            cmd /c "nmake install DESTDIR=..\_install 2>&1"
-        }
-    - cd ..