ext: Avoid content duplication in gem5-SST docs

A brief guide on how to run the gem5 SST example scripts
is already provided in the README file, so there is no need
to copy-paste it in the INSTALL file, which should cover
the building phase only.

Change-Id: I49c677f54450d97a1c8508764e45ab23b4b5fe33
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53629
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/ext/sst/INSTALL.md b/ext/sst/INSTALL.md
index 46ff4f0..1034d7d 100644
--- a/ext/sst/INSTALL.md
+++ b/ext/sst/INSTALL.md
@@ -75,17 +75,4 @@
 
 ### Running an example simulation
 
-Running the simulation
-
-```sh
-sst --add-lib-path=./ sst/example.py
-```
-
-The example SST system configuration will instantiate the gem5 system
-as specified in the gem5 system configuration located at
-`gem5/configs/example/sst/riscv_fs.py`. This configuration will download
-the `bbl-busybox-boot-exit` resource, which contains an m5 binary, and
-`m5 exit` will be called upon the booting process reaching the early userspace.
-More information about building a bootloader containing a Linux Kernel and a
-customized workload is available at
-[https://gem5.googlesource.com/public/gem5-resources/+/refs/heads/develop/src/riscv-boot-exit-nodisk/].
+See `README.md`
diff --git a/ext/sst/README.md b/ext/sst/README.md
index 8e2de1d..148adcc 100644
--- a/ext/sst/README.md
+++ b/ext/sst/README.md
@@ -68,11 +68,14 @@
 Running the simulation
 
 ```sh
-sst sst/example.py
+sst --add-lib-path=./ sst/example.py
 ```
 
-`bbl-busybox-boot-exit` contains an m5 binary, and `m5 exit` will be called
-upon the booting process reaching the early userspace.
+The example SST system configuration will instantiate the gem5 system
+as specified in the gem5 system configuration located at
+`gem5/configs/example/sst/riscv_fs.py`. This configuration will download
+the `bbl-busybox-boot-exit` resource, which contains an m5 binary, and
+`m5 exit` will be called upon the booting process reaching the early userspace.
 More information about building a bootloader containing a Linux Kernel and a
 customized workload is available at
 [https://gem5.googlesource.com/public/gem5-resources/+/refs/heads/develop/src/riscv-boot-exit-nodisk/].