Removed the NOTE due to anaconda distribution not used here any more

docs/setup.rst

@@ -41,16 +41,13 @@ The following python packages must be installed::
   pip install python-igraph
   pip install fireworks
 
-**NOTE:** For the igraph package a C compiler must be installed on your computer.
-
-**NOTE:** If later, during usage of the igraph package, an error like this::
-
-  ImportError: anaconda3/lib/python3.6/site-packages/igraph/_igraph.cpython-36m-x86_64-linux-gnu.so: undefined symbol: _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1Ev
-
-occurs, then the libgcc package has to be installed/upgraded::
-
-  conda install libgcc
+**NOTE:** For the igraph package a C++ compiler and some additional development
+packages must be installed on your computer. For CentOS and Red Hat Linux these
+can be installed with::
 
+  sudo yum install gcc-c++
+  sudo yum install libxml2-devel
+  sudo yum install python3-devel
 
 Setting up a FireServer
 ~~~~~~~~~~~~~~~~~~~~~~~