update the README

Author: Lin Yang

README.md

@@ -1,11 +1,4 @@
-For those who want to run RIMA on Kraken, **first** , use the following code to activate the RIMA environment on Kraken:
-
-**export CONDA_ROOT=/liulab/linyang/rnaseq_env/miniconda3**  
-**export PATH=/liulab/linyang/rnaseq_env/miniconda3/bin:$PATH**  
-**source activate /liulab/linyang/rnaseq_env/miniconda3/envs/rnaseq**
-
-
-**then**, follow RIMA tutorial start from chapter 2.3:  
+RIMA tutorial:  
 https://liulab-dfci.github.io/RIMA/