Remove unfinished file receiver (#473)

Author: djaglowski

distributions/otelcol-contrib/manifest.yaml

@@ -132,7 +132,6 @@ receivers:
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/expvarreceiver v0.94.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/filelogreceiver v0.94.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/filestatsreceiver v0.94.0
-  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/filereceiver v0.94.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/flinkmetricsreceiver v0.94.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/fluentforwardreceiver v0.94.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/googlecloudpubsubreceiver v0.94.0