fix(style): remove stray EnvKlogVerbosity ref and trailing blank line

- Remove source.EnvKlogVerbosity from receive_adapter_test.go; constant
  belongs to feat/klog-verbosity and was accidentally merged via stash
- Remove trailing blank line in ApiServerSourceSpec struct body
  to satisfy goimports check

Author: Ankitsinghsisodya

pkg/apis/sources/v1/apiserver_types.go

@@ -104,7 +104,6 @@ type ApiServerSourceSpec struct {
 	//
 	// +optional
 	Filters []eventingv1.SubscriptionsAPIFilter `json:"filters,omitempty"`
-
 }
 
 // ApiServerSourceStatus defines the observed state of ApiServerSource

pkg/reconciler/apiserversource/resources/receive_adapter_test.go

@@ -175,9 +175,6 @@ O2dgzikq8iSy1BlRsVw=
 								}, {
 									Name:  source.EnvLoggingCfg,
 									Value: "",
-								}, {
-									Name:  source.EnvKlogVerbosity,
-									Value: "",
 								}, {
 									Name:  source.EnvObservabilityCfg,
 									Value: "",