Update rule.adoc

rules/S7106/cfamily/metadata.json

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+{
+  "title": "S6004 invisible replacement",
+  "type": "CODE_SMELL",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "5min"
+  },
+  "tags": [
+  ],
+  "defaultSeverity": "Major",
+  "ruleSpecification": "RSPEC-7106",
+  "sqKey": "S7106",
+  "scope": "All",
+  "defaultQualityProfiles": [],
+  "quickfix": "unknown",
+  "code": {
+    "impacts": {
+      "MAINTAINABILITY": "HIGH",
+      "RELIABILITY": "MEDIUM",
+      "SECURITY": "LOW"
+    },
+    "attribute": "CONVENTIONAL"
+  }
+}

rules/S7106/cfamily/rule.adoc

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+== Why is this an issue?
+
+Nothing to see here, this is a placeholder for S6004 replacement.

rules/S7106/metadata.json

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+{
+}