Revert "Try NOINSTALLEDCONSTRAINTS=true"

This reverts commit 6f33b336.

.travis.yml

@@ -37,37 +37,37 @@ before_cache:
 matrix:
   include:
     - compiler: "ghc-8.6.1"
-      env: GHCHEAD=true NOINSTALLEDCONSTRAINTS=true
+      env: GHCHEAD=true
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-8.6.1], sources: [hvr-ghc]}}
     - compiler: "ghc-8.4.3"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.4.3], sources: [hvr-ghc]}}
     - compiler: "ghc-8.2.2"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.2.2], sources: [hvr-ghc]}}
     - compiler: "ghc-8.0.2"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.0.2], sources: [hvr-ghc]}}
     - compiler: "ghc-7.10.3"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.10.3], sources: [hvr-ghc]}}
     - compiler: "ghc-7.8.4"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.8.4], sources: [hvr-ghc]}}
     - compiler: "ghc-7.6.3"
-      env: HADDOCK=false NOINSTALLEDCONSTRAINTS=true
+      env: HADDOCK=false
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.6.3], sources: [hvr-ghc]}}
     - compiler: "ghc-7.4.2"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.4.2], sources: [hvr-ghc]}}
     - compiler: "ghc-7.2.2"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.2.2], sources: [hvr-ghc]}}
     - compiler: "ghc-7.0.4"
-      env: NOINSTALLEDCONSTRAINTS=true
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.0.4], sources: [hvr-ghc]}}
     - compiler: "ghc-head"
-      env: GHCHEAD=true NOINSTALLEDCONSTRAINTS=true
+      env: GHCHEAD=true
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-head], sources: [hvr-ghc]}}
 
   allow_failures: