Remove clear() method

include/mbgl/util/string_indexer.hpp

@@ -26,8 +26,6 @@ public:
 
     std::string get(const StringIdentity id);
 
-    void clear();
-
     size_t size();
 
 protected:

src/mbgl/util/string_indexer.cpp

@@ -67,14 +67,6 @@ std::string StringIndexer::get(const StringIdentity id) {
     return id < identityToString.size() ? (buffer.data() + identityToString[id]) : empty;
 }
 
-void StringIndexer::clear() {
-    std::unique_lock<std::shared_mutex> writerLock(sharedMutex);
-
-    stringToIdentity.clear();
-    identityToString.clear();
-    buffer.clear();
-}
-
 size_t StringIndexer::size() {
     std::shared_lock<std::shared_mutex> readerLock(sharedMutex);
 

test/util/string_indexer.test.cpp

@@ -6,6 +6,10 @@
 
 using namespace mbgl;
 
+TEST(StringIndexer, SingletonStringIndexer) {
+    EXPECT_GE(stringIndexer().size(), 0);
+}
+
 TEST(StringIndexer, AddStrings) {
     StringIndexer strIndexer;
     EXPECT_EQ(strIndexer.size(), 0);