Disabled use of PPA

.travis.yml

@@ -13,10 +13,6 @@ matrix:
   fast_finish: true
   include:
     # Add build targets here
-    - env: GHCVER=8.2.1 CACHE_NAME=8.2.1 BUILD_BINARY=1
-      compiler: ": #stack 8.2.1"
-      addons: {apt: {packages: [ghc-8.2.1], sources: [hvr-ghc]}}
-
     - env: GHCVER=8.2.1 CACHE_NAME=8.2.1-osx BUILD_BINARY=1
            LDFLAGS=-L/usr/local/opt/readline/lib CFLAGS=-I/usr/local/opt/readline/include
       os: osx
@@ -25,8 +21,7 @@ matrix:
 
 install:
  - unset CC
- - export PATH=$HOME/.local/bin:/opt/ghc/$GHCVER/bin:$PATH
- - ./.travis/install-ghr.sh
+ - export PATH=$HOME/.local/bin:$PATH
  - ./.travis/install-stack.sh
 
 script: