ART: Remove stale TODOs

Remove a number of now stale TODOs.

Bug: 31455788
Test: m
Change-Id: I2ec22604b71817f34427bbc8e996ba01b686191b
diff --git a/runtime/openjdkjvmti/ti_field.cc b/runtime/openjdkjvmti/ti_field.cc
index 8c3f2ff..1e5fbda 100644
--- a/runtime/openjdkjvmti/ti_field.cc
+++ b/runtime/openjdkjvmti/ti_field.cc
@@ -88,7 +88,6 @@
     *signature_ptr = signature_copy.get();
   }
 
-  // TODO: Support generic signature.
   if (generic_ptr != nullptr) {
     *generic_ptr = nullptr;
     if (!art_field->GetDeclaringClass()->IsProxyClass()) {
diff --git a/runtime/openjdkjvmti/ti_phase.cc b/runtime/openjdkjvmti/ti_phase.cc
index 60371cf..e494cb6 100644
--- a/runtime/openjdkjvmti/ti_phase.cc
+++ b/runtime/openjdkjvmti/ti_phase.cc
@@ -56,7 +56,6 @@
   }
 
   void NextRuntimePhase(RuntimePhase phase) REQUIRES_SHARED(art::Locks::mutator_lock_) OVERRIDE {
-    // TODO: Events.
     switch (phase) {
       case RuntimePhase::kInitialAgents:
         PhaseUtil::current_phase_ = JVMTI_PHASE_PRIMORDIAL;
diff --git a/runtime/openjdkjvmti/ti_search.cc b/runtime/openjdkjvmti/ti_search.cc
index df80f85..f51a98f 100644
--- a/runtime/openjdkjvmti/ti_search.cc
+++ b/runtime/openjdkjvmti/ti_search.cc
@@ -212,7 +212,6 @@
     return ERR(WRONG_PHASE);
   }
   if (current->GetClassLinker() == nullptr) {
-    // TODO: Support boot classpath change in OnLoad.
     return ERR(WRONG_PHASE);
   }
   if (segment == nullptr) {