Remove file based memory reading test

Author: tejasd

firebase-perf/src/main/java/com/google/firebase/perf/session/gauges/GaugeMetadataManager.java

@@ -22,11 +22,6 @@
 import com.google.firebase.perf.util.StorageUnit;
 import com.google.firebase.perf.util.Utils;
 import com.google.firebase.perf.v1.GaugeMetadata;
-import java.io.BufferedReader;
-import java.io.FileReader;
-import java.io.IOException;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 /**
  * The {@code GaugeMetadataManager} class is responsible for collecting {@link GaugeMetadata}
@@ -73,23 +68,4 @@ public int getMaxEncouragedAppJavaHeapMemoryKb() {
   public int getDeviceRamSizeKb() {
     return Utils.saturatedIntCast(StorageUnit.BYTES.toKilobytes(memoryInfo.totalMem));
   }
-
-  /** Returns the total ram size of the device (in kilobytes) by reading the "proc/meminfo" file. */
-  @VisibleForTesting
-  int readTotalRAM(String procFileName) {
-    try (BufferedReader br = new BufferedReader(new FileReader(procFileName))) {
-      for (String s = br.readLine(); s != null; s = br.readLine()) {
-        if (s.startsWith("MemTotal")) {
-          Matcher m = Pattern.compile("\\d+").matcher(s);
-          return m.find() ? Integer.parseInt(m.group()) : 0;
-        }
-      }
-    } catch (IOException ioe) {
-      logger.warn("Unable to read '" + procFileName + "' file: " + ioe.getMessage());
-    } catch (NumberFormatException nfe) {
-      logger.warn("Unable to parse '" + procFileName + "' file: " + nfe.getMessage());
-    }
-
-    return 0;
-  }
 }