remove optional depenency helper (#68)

#### 📖 Summary

- removed optional dependency helper. Moved optional deps into `ExternalModuleDependencies` field.

#### 📑 Test Plan

> 💡 Select your test plan for the code changes.

- [x] Tested via Drone.io pipeline
- [ ] Custom test
- [ ] No test plan

##### Details / Justification

<!-- Add your test details or justification for missing tests here. -->

#### 📚 Additional Notes

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Co-authored-by: OCram85 <marco.blessing@googlemail.com>
Reviewed-on: #68

src/Connection/Connect-To.ps1

@@ -130,12 +130,6 @@ function Connect-To {
             }
         }
 
-        # First check the optional modules
-        if (-not (Resolve-Dependency -Name $Type)) {
-            Write-Error -Message (
-                "Could not resolve the optional dependencies defined for {0}" -f $Type
-            ) -ErrorAction 'Stop'
-        }
         switch ($Type) {
             "VMware" {
                 # Disable the yellow certificate warning, since we haven't replaced the SSL certs for vCenter/ESXi