Docs: Remove -O2 from installation instructions

[skip ci]

diff --git a/INSTALL.txt b/INSTALL.txt
index 7081f3077d8f91c2027de695cf6f4fea58f7c58e..960f1581d443fcfb120241a43f6503a92c1811c6 100644 (file)
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -9,31 +9,31 @@ Installation using pip:
 
     System-wide:
 
-    sudo pip install --trusted-host phdru.name --find-links=http://phdru.name/Software/Python/ --install-option='-O2' mimedecode
+    sudo pip install --trusted-host phdru.name --find-links=http://phdru.name/Software/Python/ mimedecode
 
     User mode:
 
-    pip install --trusted-host phdru.name --find-links=http://phdru.name/Software/Python/ --install-option='-O2' --user mimedecode
+    pip install --trusted-host phdru.name --find-links=http://phdru.name/Software/Python/ --user mimedecode
 
     Virtual envs:
 
-    pip install --trusted-host phdru.name --find-links=http://phdru.name/Software/Python/ --install-option='-O2' mimedecode
+    pip install --trusted-host phdru.name --find-links=http://phdru.name/Software/Python/ mimedecode
 
 Installation from sources:
 
     To install the program from sources system-wide run run the following
     command:
 
-    sudo python setup.py install -O2
+    sudo python setup.py install
 
     If you don't want to install it system-wide you can install it in your
     home directory; run run the following command:
 
-    python setup.py install -O2 --user
+    python setup.py install --user
 
     Virtual envs:
 
-    python setup.py install -O2
+    python setup.py install
 
 Option '--user' installs library parts into
 $HOME/.local/lib/python2.$VERSION/site-packages/. It also installs