Revert "KeyValueログモデル作成"

This reverts commit b75759b650.

model/src/main/java/one/nem/lacerta/model/KeyValueLog.java

@@ -1,31 +0,0 @@
-package one.nem.lacerta.model;
-
-public class KeyValueLog {
-
-    String key;
-    String value;
-
-    public KeyValueLog(String key, String value) {
-        this.key = key;
-        this.value = value;
-    }
-
-    // Getter
-    public String getKey() {
-        return key;
-    }
-
-    public String getValue() {
-        return value;
-    }
-
-    // Setter
-    public void setKey(String key) {
-        this.key = key;
-    }
-
-    public void setValue(String value) {
-        this.value = value;
-    }
-
-}