[Java API][Comment] upate java api & delete some comments (#1912)

lite/api/android/jni/src/com/baidu/paddle/lite/PowerMode.java

@@ -14,7 +14,7 @@ limitations under the License. */
 package com.baidu.paddle.lite;
 
 /**
- * PowerMode is the cpu runing mode for the light weight predictor.
+ * PowerMode is the cpu running power mode for the light weight predictor.
  */
 public enum PowerMode {
     LITE_POWER_HIGH(0),
@@ -24,8 +24,6 @@ public enum PowerMode {
     LITE_POWER_RAND_HIGH(4),
     LITE_POWER_RAND_LOW(5);
 
-    public final int value;
-
     private PowerMode(int value) {
         this.value = value;
     }
@@ -33,4 +31,6 @@ public enum PowerMode {
     public int value() {
         return this.value;
     }
+
+    private final int value;
 }

lite/model_parser/model_parser.cc

@@ -126,8 +126,6 @@ void LoadLoDTensor(std::istream &is, Variable *var) {
   TensorFromStream(is, tensor);
 }
 
-// TODO(Superjomn) support SelectedRows.
-
 void ReadBinaryFile(const std::string &filename, std::string *contents) {
   std::ifstream fin(filename, std::ios::in | std::ios::binary);
   CHECK(fin.is_open()) << "Cannot open file: " << filename;
@@ -163,7 +161,6 @@ void LoadParam(const std::string &path, Variable *out) {
   LoadLoDTensor(fin, out);
 }
 
-//
 bool IsPersistable(const cpp::VarDesc &var) {
   if (var.Persistable() && var.GetType() != VarDescAPI::Type::FEED_MINIBATCH &&
       var.GetType() != VarDescAPI::Type::FETCH_LIST &&