Undeprecate logparser

Until dynamic file tailing can be added to the tail plugin.

CHANGELOG.md

@@ -1,11 +1,5 @@
 ## v1.8 [unreleased]
 
-### Release Notes
-
-- With the addition of the standalone `grok` input data format, the
-  `logparser` input plugin has been deprecated in favor of using the `tail`
-  input plugin combined with `data_format="grok"` .
-
 ### New Inputs
 
 - [activemq](./plugins/inputs/activemq/README.md) - Contributed by @mlabouardy

plugins/inputs/logparser/README.md

@@ -1,7 +1,5 @@
 # Logparser Input Plugin
 
-### **Deprecated in version 1.8**: Please use the [tail](/plugins/inputs/tail) plugin with the `grok` [data format](/docs/DATA_FORMATS_INPUT.md).
-
 The `logparser` plugin streams and parses the given logfiles. Currently it
 has the capability of parsing "grok" patterns from logfiles, which also supports
 regex patterns.
@@ -10,9 +8,6 @@ regex patterns.
 
 ```toml
 [[inputs.logparser]]
-  ## DEPRECATED: The `logparser` plugin is deprecated in 1.8.  Please use the
-  ## `tail` plugin with the grok data_format instead.
-
   ## Log files to parse.
   ## These accept standard unix glob matching rules, but with the addition of
   ## ** as a "super asterisk". ie:

plugins/inputs/logparser/logparser.go

@@ -54,9 +54,6 @@ type LogParserPlugin struct {
 }
 
 const sampleConfig = `
-  ## DEPRECATED: The 'logparser' plugin is deprecated in 1.8.  Please use the
-  ## 'tail' plugin with the grok data_format as a replacement.
-
   ## Log files to parse.
   ## These accept standard unix glob matching rules, but with the addition of
   ## ** as a "super asterisk". ie:
@@ -126,9 +123,6 @@ func (l *LogParserPlugin) Gather(acc telegraf.Accumulator) error {
 
 // Start kicks off collection of stats for the plugin
 func (l *LogParserPlugin) Start(acc telegraf.Accumulator) error {
-	log.Println("W! DEPRECATED: The logparser plugin is deprecated in 1.8. " +
-		"Please use the tail plugin with the grok data_format as a replacement.")
-
 	l.Lock()
 	defer l.Unlock()