diff --git a/django/core/management/sql.py b/django/core/management/sql.py
index 2c70630ad7..f8f85a0c3d 100644
--- a/django/core/management/sql.py
+++ b/django/core/management/sql.py
@@ -1,7 +1,5 @@
 from __future__ import unicode_literals
 
-import re
-
 from django.apps import apps
 from django.core.management.base import CommandError
 from django.db import models, router
@@ -168,22 +166,6 @@ def sql_all(app_config, style, connection):
     )
 
 
-def _split_statements(content):
-    # Private API only called from code that emits a RemovedInDjango19Warning.
-    comment_re = re.compile(r"^((?:'[^']*'|[^'])*?)--.*$")
-    statements = []
-    statement = []
-    for line in content.split("\n"):
-        cleaned_line = comment_re.sub(r"\1", line).strip()
-        if not cleaned_line:
-            continue
-        statement.append(cleaned_line)
-        if cleaned_line.endswith(";"):
-            statements.append(" ".join(statement))
-            statement = []
-    return statements
-
-
 def emit_pre_migrate_signal(verbosity, interactive, db):
     # Emit the pre_migrate signal for every application.
     for app_config in apps.get_app_configs():
diff --git a/django/db/backends/base/operations.py b/django/db/backends/base/operations.py
index 24bcbb3d08..09a6316376 100644
--- a/django/db/backends/base/operations.py
+++ b/django/db/backends/base/operations.py
@@ -1,13 +1,12 @@
 import datetime
 import decimal
 from importlib import import_module
-import warnings
 
 from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
 from django.db.backends import utils
 from django.utils import six, timezone
 from django.utils.dateparse import parse_duration
-from django.utils.deprecation import RemovedInDjango19Warning
 from django.utils.encoding import force_text
 
 
@@ -255,7 +254,7 @@ class BaseDatabaseOperations(object):
         """
         return 'DEFAULT'
 
-    def prepare_sql_script(self, sql, _allow_fallback=False):
+    def prepare_sql_script(self, sql):
         """
         Takes a SQL script that may contain multiple lines and returns a list
         of statements to feed to successive cursor.execute() calls.
@@ -264,21 +263,13 @@ class BaseDatabaseOperations(object):
         cursor.execute() call and PEP 249 doesn't talk about this use case,
         the default implementation is conservative.
         """
-        # Remove _allow_fallback and keep only 'return ...' in Django 1.9.
         try:
-            # This import must stay inside the method because it's optional.
             import sqlparse
         except ImportError:
-            if _allow_fallback:
-                # Without sqlparse, fall back to the legacy (and buggy) logic.
-                warnings.warn(
-                    "Providing initial SQL data on a %s database will require "
-                    "sqlparse in Django 1.9." % self.connection.vendor,
-                    RemovedInDjango19Warning)
-                from django.core.management.sql import _split_statements
-                return _split_statements(sql)
-            else:
-                raise
+            raise ImproperlyConfigured(
+                "sqlparse is required if you don't split your SQL "
+                "statements manually."
+            )
         else:
             return [sqlparse.format(statement, strip_comments=True)
                     for statement in sqlparse.split(sql) if statement]
diff --git a/django/db/backends/postgresql_psycopg2/operations.py b/django/db/backends/postgresql_psycopg2/operations.py
index 27b19db459..ab9f60e927 100644
--- a/django/db/backends/postgresql_psycopg2/operations.py
+++ b/django/db/backends/postgresql_psycopg2/operations.py
@@ -86,7 +86,7 @@ class DatabaseOperations(BaseDatabaseOperations):
     def no_limit_value(self):
         return None
 
-    def prepare_sql_script(self, sql, _allow_fallback=False):
+    def prepare_sql_script(self, sql):
         return [sql]
 
     def quote_name(self, name):