Remove qec section from community/terra now that we have ignis. (#713)

Author: attp

terra/README.md

@@ -4,10 +4,9 @@ In this folder we have a collection of great tutorials from our fantastic Qiskit
 
 * [Introductory Quantum Information Science](qis_intro)
 * [Advanced Quantum Information Science](qis_adv)
-* [Quantum Error Correction](qec)
 
 Load up [index.ipynb](index.ipynb) to start exploring quantum information science with Qiskit Terra!
 
 ## Contributing
 
-Quantum information science is such an interesting topic and we have by no means covered everything! We welcome additional notebooks in the relevant folder. The [quantum error correction](qec) folder is currently looking particularly empty...
+Quantum information science is such an interesting topic and we have by no means covered everything! We welcome additional notebooks in the relevant folder.

terra/index.ipynb

@@ -35,11 +35,7 @@
     "    * [Topological Quantum Walks](qis_adv/topological_quantum_walk.ipynb)\n",
     "    * [Vaidman Detection Test](qis_adv/vaidman_detection_test.ipynb)\n",
     "\n",
-    "<!-- space -->\n",
-    "\n",
-    "* [Quantum Error Correction](qec)\n",
-    "\n",
-    "Note that we have more tutorials than those listed above, which can be found in the [Advanced Quantum Information Science](qis_adv) folder, however they have not been updated to Qiskit 0.10, so may not work. If you would like to contribute, updating an exisiting tutorial to add to the list would be great start, or you could create a new tutorial, perhaps an quantum error correction one..."
+    "Note that we have more tutorials than those listed above, which can be found in the [Advanced Quantum Information Science](qis_adv) folder, however they have not been updated to Qiskit 0.10, so may not run. If you would like to contribute, updating an exisiting tutorial to add to the list would be great start, or you could create a new tutorial!"
    ]
   },
   {