po: delete duplicate translations

After the typo fixes, some of the translations were duplicated leading
to errors during message generation.

po/cs.po

@@ -1723,11 +1723,6 @@ msgstr "Zahlcení zdroje: %u"
 msgid "redirect: %u"
 msgstr "Počet přesměrování: %u"
 
-#: ../statistics.c:135
-#, c-format
-msgid "echo requests: %u"
-msgstr "Žádost o echo: %u"
-
 #: ../statistics.c:137
 #, c-format
 msgid "timestamp requests: %u"

po/de.po

@@ -1629,11 +1629,6 @@ msgstr "Source Quench: %d"
 msgid "redirect: %d"
 msgstr "Umleitungen: %d"
 
-#: ../statistics.c:106
-#, c-format
-msgid "echo requests: %d"
-msgstr "Echo Anfragen: %d"
-
 #: ../statistics.c:108
 #, c-format
 msgid "timestamp requests: %d"

po/et_EE.po

@@ -1461,11 +1461,6 @@ msgstr "pidurduspakette (source quench): %u"
 msgid "redirect: %u"
 msgstr "mbersuunamisi: %u"
 
-#: ../statistics.c:108
-#, c-format
-msgid "echo requests: %u"
-msgstr " echo pringuid: %u"
-
 #: ../statistics.c:110
 #, c-format
 msgid "timestamp requests: %u"

po/fr.po

@@ -1647,11 +1647,6 @@ msgstr "Source Quench: %d"
 msgid "redirect: %d"
 msgstr "redirection: %d"
 
-#: ../statistics.c:106
-#, c-format
-msgid "echo requests: %d"
-msgstr "requte echo: %d"
-
 #: ../statistics.c:108
 #, c-format
 msgid "timestamp requests: %d"

po/pt_BR.po

@@ -1641,11 +1641,6 @@ msgstr "source quench: %d"
 msgid "redirect: %d"
 msgstr "redirees: %d"
 
-#: ../statistics.c:106
-#, c-format
-msgid "echo requests: %d"
-msgstr "requisies de eco: %d"
-
 #: ../statistics.c:108
 #, c-format
 msgid "timestamp requests: %d"