remove redundant installation in travis.yml

.travis.yml

@@ -33,7 +33,7 @@ install:
   - pip install -r requirements_tests.txt
   - pip install https://github.com/pysal/splot/archive/master.zip
   - if "$PYSAL_PYPI"; then
-        echo 'testing pypi libpysal esda mapclassify' && pip install libpysal esda mapclassify;
+        echo 'testing pypi libpysal esda mapclassify';
     else
         echo 'testing git libpysal esda mapclassify';
         git clone https://github.com/pysal/libpysal.git; cd libpysal; pip install .; cd ../;