Update Installing_Python_and_Python_Packages.rst

Author: ifenty

doc/Installing_Python_and_Python_Packages.rst

@@ -71,24 +71,11 @@ Option 1: *Conda*
     conda install -c conda-forge cmocean
     conda install -c conda-forge pyresample
     conda install -c conda-forge xarray dask netCDF4 bottleneck
-    [SEE NOTE!] conda install -c conda-forge xmitgcm
+    conda install -c conda-forge xmitgcm
     conda install -c conda-forge xgcm
     conda install -c conda-forge cartopy
 
 
-.. attention::
-
-	As of 2020-11-18 xmitgcm must be installed by cloning the github repository and then running the following:
-	
-.. code-block:: bash
-
-	git clone https://github.com/MITgcm/xmitgcm.git
-	cd xmitgcm
-	python setup.py install
-
-
- 
-
 Option 2: *pip* alone (not recommended)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -106,16 +93,6 @@ Option 2: *pip* alone (not recommended)
     pip install xgcm
     pip install cmocean
 
-.. attention::
-
-	As of 2020-11-18 xmitgcm must be installed by cloning the github repository and then running the following:
-	
-.. code-block:: bash
-
-	git clone https://github.com/MITgcm/xmitgcm.git
-	cd xmitgcm
-	python setup.py install
-