CLN: remove unused fields.pyx code/asvs (#44150)

Author: jbrockmendel

asv_bench/benchmarks/tslibs/fields.py

@@ -12,7 +12,7 @@
 class TimeGetTimedeltaField:
     params = [
         _sizes,
-        ["days", "h", "s", "seconds", "ms", "microseconds", "us", "ns", "nanoseconds"],
+        ["days", "seconds", "microseconds", "nanoseconds"],
     ]
     param_names = ["size", "field"]
 

pandas/_libs/tslibs/fields.pyx

@@ -487,28 +487,6 @@ def get_timedelta_field(const int64_t[:] tdindex, str field):
                 out[i] = tds.days
         return out
 
-    elif field == 'h':
-        with nogil:
-            for i in range(count):
-                if tdindex[i] == NPY_NAT:
-                    out[i] = -1
-                    continue
-
-                td64_to_tdstruct(tdindex[i], &tds)
-                out[i] = tds.hrs
-        return out
-
-    elif field == 's':
-        with nogil:
-            for i in range(count):
-                if tdindex[i] == NPY_NAT:
-                    out[i] = -1
-                    continue
-
-                td64_to_tdstruct(tdindex[i], &tds)
-                out[i] = tds.sec
-        return out
-
     elif field == 'seconds':
         with nogil:
             for i in range(count):
@@ -520,17 +498,6 @@ def get_timedelta_field(const int64_t[:] tdindex, str field):
                 out[i] = tds.seconds
         return out
 
-    elif field == 'ms':
-        with nogil:
-            for i in range(count):
-                if tdindex[i] == NPY_NAT:
-                    out[i] = -1
-                    continue
-
-                td64_to_tdstruct(tdindex[i], &tds)
-                out[i] = tds.ms
-        return out
-
     elif field == 'microseconds':
         with nogil:
             for i in range(count):
@@ -542,28 +509,6 @@ def get_timedelta_field(const int64_t[:] tdindex, str field):
                 out[i] = tds.microseconds
         return out
 
-    elif field == 'us':
-        with nogil:
-            for i in range(count):
-                if tdindex[i] == NPY_NAT:
-                    out[i] = -1
-                    continue
-
-                td64_to_tdstruct(tdindex[i], &tds)
-                out[i] = tds.us
-        return out
-
-    elif field == 'ns':
-        with nogil:
-            for i in range(count):
-                if tdindex[i] == NPY_NAT:
-                    out[i] = -1
-                    continue
-
-                td64_to_tdstruct(tdindex[i], &tds)
-                out[i] = tds.ns
-        return out
-
     elif field == 'nanoseconds':
         with nogil:
             for i in range(count):