Update contributor docs (#1472)

* Removes mention of non-existing make targets
* Updates `kind create` snippet with correct one

Signed-off-by: Mikalai Radchuk <mradchuk@redhat.com>

Author: m1kola

CONTRIBUTING.md

@@ -44,7 +44,7 @@ you can follow the steps below to test your changes:
 1. Create the cluster:
 
     ```sh
-    kind create cluster operator-controller
+    kind create cluster -n operator-controller
     ```
 
 2. Build your changes:

docs/contribute/developer.md

@@ -49,29 +49,13 @@ curl -L -s https://github.com/operator-framework/operator-controller/releases/la
     make deploy IMG=<some-registry>/operator-controller:tag
     ```
 
-### Uninstall CRDs
-To delete the CRDs from the cluster:
-
-```sh
-make uninstall
-```
-
-### Undeploy controller
-To undeploy the controller from the cluster:
-
-```sh
-make undeploy
-```
-
 ### Modifying the API definitions
 If you are editing the API definitions, generate the manifests such as CRs or CRDs using:
 
 ```sh
 make manifests
 ```
 
----
-
 !!! note
     Run `make help` for more information on all potential `make` targets.