[receiver/hostmetrics] remove receiver.hostmetrics.normalizeProcessCPUUtilization feature gate (open-telemetry#37641)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description

<!-- Issue number (e.g. open-telemetry#1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Fixes open-telemetry#34763

Signed-off-by: odubajDT <[email protected]>

Author: odubajDT

.chloggen/hostmetricsreceiver-feature.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: receiver/hostmetrics
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Remove receiver.hostmetrics.normalizeProcessCPUUtilization feature gate"
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [34763]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

receiver/hostmetricsreceiver/internal/scraper/processscraper/ucal/cpu_utilization_calculator.go

@@ -8,21 +8,9 @@ import (
 	"time"
 
 	"github.com/shirou/gopsutil/v4/cpu"
-	"go.opentelemetry.io/collector/featuregate"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 )
 
-func init() {
-	_ = featuregate.GlobalRegistry().MustRegister(
-		"receiver.hostmetrics.normalizeProcessCPUUtilization",
-		featuregate.StageStable,
-		featuregate.WithRegisterDescription("When enabled, normalizes the process.cpu.utilization metric onto the interval [0-1] by dividing the value by the number of logical processors."),
-		featuregate.WithRegisterFromVersion("v0.97.0"),
-		featuregate.WithRegisterToVersion("v0.112.0"),
-		featuregate.WithRegisterReferenceURL("https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/31368"),
-	)
-}
-
 // CPUUtilization stores the utilization percents [0-1] for the different cpu states
 type CPUUtilization struct {
 	User   float64