Remove check for HCP environment variables, trust the SDK to do its job :)

internal/hcp/api/client.go

@@ -37,13 +37,6 @@ type Client struct {
 // Client authentication requires the following environment variables be set HCP_CLIENT_ID and HCP_CLIENT_SECRET.
 // Upon error a HCPClientError will be returned.
 func NewClient() (*Client, error) {
-	if !env.HasHCPCredentials() {
-		return nil, &ClientError{
-			StatusCode: InvalidClientConfig,
-			Err:        fmt.Errorf("the client authentication requires both %s and %s environment variables to be set", env.HCPClientID, env.HCPClientSecret),
-		}
-	}
-
 	hcpClientCfg := httpclient.Config{
 		SourceChannel: fmt.Sprintf("packer/%s", version.PackerVersion.FormattedVersion()),
 	}

internal/hcp/registry/hcp.go

@@ -63,17 +63,6 @@ func IsHCPEnabled(cfg packer.Handler) bool {
 func createConfiguredBucket(templateDir string, opts ...bucketConfigurationOpts) (*Bucket, hcl.Diagnostics) {
 	var diags hcl.Diagnostics
 
-	if !env.HasHCPCredentials() {
-		diags = append(diags, &hcl.Diagnostic{
-			Summary: "HCP authentication information required",
-			Detail: fmt.Sprintf("The client authentication requires both %s and %s environment "+
-				"variables to be set for authenticating with HCP.",
-				env.HCPClientID,
-				env.HCPClientSecret),
-			Severity: hcl.DiagError,
-		})
-	}
-
 	bucket := NewBucketWithVersion()
 
 	for _, opt := range opts {