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diff --git a/deps/icu-small/source/i18n/digitgrouping.h b/deps/icu-small/source/i18n/digitgrouping.h
deleted file mode 100644
index f3f8679b87..0000000000
--- a/deps/icu-small/source/i18n/digitgrouping.h
+++ /dev/null
@@ -1,112 +0,0 @@
-// © 2016 and later: Unicode, Inc. and others.
-// License & terms of use: http://www.unicode.org/copyright.html
-/*
-*******************************************************************************
-* Copyright (C) 2015, International Business Machines
-* Corporation and others.  All Rights Reserved.
-*******************************************************************************
-* digitgrouping.h
-*
-* created on: 2015jan6
-* created by: Travis Keep
-*/
-
-#ifndef __DIGITGROUPING_H__
-#define __DIGITGROUPING_H__
-
-#include "unicode/uobject.h"
-#include "unicode/utypes.h"
-
-U_NAMESPACE_BEGIN
-
-class IntDigitCountRange;
-
-/**
- * The digit grouping policy.
- */
-class U_I18N_API DigitGrouping : public UMemory {
-public:
-    /**
-     * Default is no digit grouping.
-     */
-    DigitGrouping() : fGrouping(0), fGrouping2(0), fMinGrouping(0) { }
-
-    /**
-     * Returns TRUE if this object is equal to rhs.
-     */
-    UBool equals(const DigitGrouping &rhs) const {
-        return ((fGrouping == rhs.fGrouping) &&
-                (fGrouping2 == rhs.fGrouping2) &&
-                (fMinGrouping == rhs.fMinGrouping));
-    }
-
-    /**
-     * Returns true if a separator is needed after a particular digit.
-     * @param digitsLeftOfDecimal the total count of digits left of the
-     *  decimal.
-     * @param digitPos 0 is the one's place; 1 is the 10's place; -1 is the
-     *   1/10's place etc.
-     */
-    UBool isSeparatorAt(int32_t digitsLeftOfDecimal, int32_t digitPos) const;
-
-    /**
-     * Returns the total number of separators to be used to format a particular
-     * number.
-     * @param digitsLeftOfDecimal the total number of digits to the left of
-     *   the decimal.
-     */
-    int32_t getSeparatorCount(int32_t digitsLeftOfDecimal) const;
-
-    /**
-     * Returns true if grouping is used FALSE otherwise. When
-     * isGroupingUsed() returns FALSE; isSeparatorAt always returns FALSE
-     * and getSeparatorCount always returns 0.
-     */
-    UBool isGroupingUsed() const { return fGrouping > 0; }
-
-    /**
-     * Returns TRUE if this instance would not add grouping separators
-     * when formatting value using the given constraint on digit count.
-     *
-     * @param value the value to format.
-     * @param range the minimum and maximum digits for formatting value.
-     */
-    UBool isNoGrouping(
-            int32_t positiveValue, const IntDigitCountRange &range) const;
-
-    /**
-     * Clears this instance so that digit grouping is not in effect.
-     */
-    void clear();
-
-public:
-
-    /**
-     * Primary grouping size. A value of 0, the default, or a negative
-     * number causes isGroupingUsed() to return FALSE.
-     */
-    int32_t fGrouping;
-
-    /**
-     * Secondary grouping size. If > 0, this size is used instead of
-     * 'fGrouping' for all but the group just to the left of the decimal
-     * point. The default value of 0, or a negative value indicates that
-     * there is no secondary grouping size.
-     */
-    int32_t fGrouping2;
-
-    /**
-     * If set (that is > 0), uses no grouping separators if fewer than
-     * (fGrouping + fMinGrouping) digits appear left of the decimal place.
-     * The default value for this field is 0.
-     */
-    int32_t fMinGrouping;
-private:
-    UBool isGroupingEnabled(int32_t digitsLeftOfDecimal) const;
-    int32_t getGrouping2() const;
-    int32_t getMinGrouping() const;
-};
-
-U_NAMESPACE_END
-
-#endif  // __DIGITGROUPING_H__