Remove superfluous single quote

Author: BanzaiMan

.travis.yml

@@ -27,7 +27,7 @@ install:
 
 before_script:
   - 'export INSTALL_DEST=${INSTALL_DEST:-/opt/python}'
-  - export LSB_RELEASE=$(lsb_release -rs 2>/dev/null || sw_vers -productVersion | sed 's/^\([0-9][0-9]*.[0-9][0-9]*\).*/\1/')'
+  - export LSB_RELEASE=$(lsb_release -rs 2>/dev/null || sw_vers -productVersion | sed 's/^\([0-9][0-9]*.[0-9][0-9]*\).*/\1/')
   - 'export OS_NAME=${OS_NAME:-$((lsb_release -is || echo "osx") | tr "A-Z" "a-z")}'
   - 'export ARCH=${ARCH:-$(uname -m)}'
   - 'export PACKAGES=${PACKAGES:-pip numpy nose pytest mock wheel}'