Revert "Fix: osx ssl env travis"

This reverts commit 828ac5b6e2961a12c0d32565f18c78d05bc4ee83.

.travis.yml

@@ -2,8 +2,8 @@ language: cpp
 
 
 before_install:
-  - export SSL_CFLAGS="$SSL_CFLAGS -I/usr/local/opt/openssl/include"
-  - export SSL_LIBS="$SSL_LIBS -L/usr/local/opt/openssl/lib"
+  - export CPPFLAGS="$CPPFLAGS -I/usr/local/opt/openssl/include"
+  - export LDFLAGS="$LDFLAGS -L/usr/local/opt/openssl/lib"
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew outdated openssl || brew upgrade openssl; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew unlink protobuf; fi