Remove deprecated method newLongTaskTimer(Id) on MeterRegistry

Closes gh-3015

micrometer-api/src/main/java/io/micrometer/api/instrument/MeterRegistry.java

@@ -165,20 +165,6 @@ protected MeterRegistry(Clock clock) {
      */
     protected abstract Counter newCounter(Meter.Id id);
 
-    /**
-     * Build a new long task timer to be added to the registry. This is guaranteed to only be called if the long task timer doesn't already exist.
-     *
-     * @param id The id that uniquely identifies the long task timer.
-     * @return A new long task timer.
-     * @deprecated Implement {@link #newLongTaskTimer(Meter.Id, DistributionStatisticConfig)} instead.
-     */
-    @SuppressWarnings("DeprecatedIsStillUsed")
-    @Deprecated
-    protected LongTaskTimer newLongTaskTimer(Meter.Id id) {
-        throw new UnsupportedOperationException("MeterRegistry implementations may still override this, but it is only " +
-                "invoked by the overloaded form of newLongTaskTimer for backwards compatibility.");
-    }
-
     /**
      * Build a new long task timer to be added to the registry. This is guaranteed to only be called if the long task timer doesn't already exist.
      *
@@ -187,9 +173,7 @@ protected LongTaskTimer newLongTaskTimer(Meter.Id id) {
      * @return A new long task timer.
      * @since 1.5.0
      */
-    protected LongTaskTimer newLongTaskTimer(Meter.Id id, DistributionStatisticConfig distributionStatisticConfig) {
-        return newLongTaskTimer(id); // default implementation for backwards compatibility
-    }
+    protected abstract LongTaskTimer newLongTaskTimer(Meter.Id id, DistributionStatisticConfig distributionStatisticConfig);
 
     /**
      * Build a new timer to be added to the registry. This is guaranteed to only be called if the timer doesn't already exist.