Filestream ignores clean_inactive

[belimawr]

Steps to Reproduce:

1. Delete the two references for CleanInactive from the Filestream input

modified   filebeat/input/filestream/config.go
@@ -38,7 +38,6 @@ type config struct {
 	Close          closerConfig       `config:"close"`
 	FileWatcher    *conf.Namespace    `config:"prospector"`
 	FileIdentity   *conf.Namespace    `config:"file_identity"`
-	CleanInactive  time.Duration      `config:"clean_inactive" validate:"min=0"`
 	CleanRemoved   bool               `config:"clean_removed"`
 	HarvesterLimit uint32             `config:"harvester_limit" validate:"min=0"`
 	IgnoreOlder    time.Duration      `config:"ignore_older"`
@@ -98,7 +97,6 @@ func defaultConfig() config {
 		Reader:         defaultReaderConfig(),
 		Paths:          []string{},
 		Close:          defaultCloserConfig(),
-		CleanInactive:  0,
 		CleanRemoved:   true,
 		HarvesterLimit: 0,
 		IgnoreOlder:    0,

2. Build Filebeat. It will build without issues, which means this config option is not being used.
3. (Optionally) edit filebeat/tests/system/test_registrar.py so the test_clean_inactive test uses the filestream input instead of the log input:

modified   filebeat/tests/system/test_registrar.py
@@ -779,7 +779,8 @@ class Test(BaseTest):
             clean_inactive="3s",
             ignore_older="2s",
             close_inactive="0.2s",
-            scan_frequency="0.1s"
+            scan_frequency="0.1s",
+            type="filestream",
         )

4. Run the test (from beats root)

cd filebeat
mage buildSystemTestBinary
source $(mage pythonVirtualEnv)/bin/activate
pytest -k test_clean_inactive ./tests/system/test_registrar.py

5. The test will fail