Update README.md

README.md

@@ -29,15 +29,11 @@ test_repo/
 ├── README.md
 ├── study_meta.csv
 ├── gene_expr/
-│    ├── GSE/
-│    │    └─ GSE*_gene_expr.csv
-│    └── E_MTAB/
-│         └─ E_MTAB*_gene_expr.csv
+│    ├── GSE*_gene_expr.csv
+│    └── E_MTAB*_gene_expr.csv
 └── meta_info/
-     ├── GSE/
-     │    └─ GSE*_meta.csv
-     └── E_MTAB/
-          └─ E_MTAB*_meta.csv
+     ├── GSE*_meta.csv
+     └── E_MTAB*_meta.csv
 ```
 
 The following study_IDs have children studies, detailed is shown in *study_meta.csv*